IXGBE_VTIVAR
regs_buff[12] = IXGBE_READ_REG(hw, IXGBE_VTIVAR(0));
ivar = IXGBE_READ_REG(hw, IXGBE_VTIVAR(queue >> 1));
IXGBE_WRITE_REG(hw, IXGBE_VTIVAR(queue >> 1), ivar);